Harmonic wavelengths of 532 nm (green) and 355 nm (UV) can be used for bleaching and photo reduction processes. UV-induced photo reduction is often called „cold marking“, as there is no noticeable heating of the material.

Plastics with Additives

The use of laser-sensitive additives in plastics can generate considerable advantages. Additives in plastics are able to increase outline sharpness and contrast and thus boost readability of the marking contents e.g. of machine-readable codes. Used with transparent and semi-transparent materials, additives lead to a uniform contrast dispersal. Additives in plastics increase the diversity of product colors and are of crucial importance for the markability of certain materials.